EP3068384B1 - Complexe de fer pour la réduction de la colonisation du tractus gastro-intestinal par campylobactérie - Google Patents

Complexe de fer pour la réduction de la colonisation du tractus gastro-intestinal par campylobactérie Download PDF

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Publication number
EP3068384B1
EP3068384B1 EP13709500.6A EP13709500A EP3068384B1 EP 3068384 B1 EP3068384 B1 EP 3068384B1 EP 13709500 A EP13709500 A EP 13709500A EP 3068384 B1 EP3068384 B1 EP 3068384B1
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Prior art keywords
animal
compound
campylobacter
feed
gastrointestinal tract
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German (de)
English (en)
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EP3068384A1 (fr
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Jafar Mahdavi
Dlawer ALA' ALDEEN
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Akeso Biomedical Inc
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Akeso Biomedical Inc
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Priority claimed from GBGB1202681.1A external-priority patent/GB201202681D0/en
Priority claimed from GBGB1220158.8A external-priority patent/GB201220158D0/en
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Priority to EP19164659.5A priority Critical patent/EP3569230A1/fr
Priority to PL13709500T priority patent/PL3068384T3/pl
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K31/00—Medicinal preparations containing organic active ingredients
    • A61K31/28—Compounds containing heavy metals
    • A61K31/295—Iron group metal compounds
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23K—FODDER
    • A23K20/00—Accessory food factors for animal feeding-stuffs
    • A23K20/10—Organic substances
    • A23K20/111—Aromatic compounds
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23K—FODDER
    • A23K20/00—Accessory food factors for animal feeding-stuffs
    • A23K20/10—Organic substances
    • A23K20/142—Amino acids; Derivatives thereof
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23K—FODDER
    • A23K50/00—Feeding-stuffs specially adapted for particular animals
    • A23K50/70—Feeding-stuffs specially adapted for particular animals for birds
    • A23K50/75—Feeding-stuffs specially adapted for particular animals for birds for poultry
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K31/00—Medicinal preparations containing organic active ingredients
    • A61K31/13—Amines
    • A61K31/132—Amines having two or more amino groups, e.g. spermidine, putrescine
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K31/00—Medicinal preparations containing organic active ingredients
    • A61K31/13—Amines
    • A61K31/135—Amines having aromatic rings, e.g. ketamine, nortriptyline
    • A61K31/136—Amines having aromatic rings, e.g. ketamine, nortriptyline having the amino group directly attached to the aromatic ring, e.g. benzeneamine
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K31/00—Medicinal preparations containing organic active ingredients
    • A61K31/16—Amides, e.g. hydroxamic acids
    • A61K31/164—Amides, e.g. hydroxamic acids of a carboxylic acid with an aminoalcohol, e.g. ceramides
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K31/00—Medicinal preparations containing organic active ingredients
    • A61K31/185—Acids; Anhydrides, halides or salts thereof, e.g. sulfur acids, imidic, hydrazonic or hydroximic acids
    • A61K31/19—Carboxylic acids, e.g. valproic acid
    • A61K31/191—Carboxylic acids, e.g. valproic acid having two or more hydroxy groups, e.g. gluconic acid
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K31/00—Medicinal preparations containing organic active ingredients
    • A61K31/185—Acids; Anhydrides, halides or salts thereof, e.g. sulfur acids, imidic, hydrazonic or hydroximic acids
    • A61K31/19—Carboxylic acids, e.g. valproic acid
    • A61K31/195—Carboxylic acids, e.g. valproic acid having an amino group
    • A61K31/197—Carboxylic acids, e.g. valproic acid having an amino group the amino and the carboxyl groups being attached to the same acyclic carbon chain, e.g. gamma-aminobutyric acid [GABA], beta-alanine, epsilon-aminocaproic acid or pantothenic acid
    • A61K31/198—Alpha-amino acids, e.g. alanine or edetic acid [EDTA]
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K31/00—Medicinal preparations containing organic active ingredients
    • A61K31/33—Heterocyclic compounds
    • A61K31/335—Heterocyclic compounds having oxygen as the only ring hetero atom, e.g. fungichromin
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K31/00—Medicinal preparations containing organic active ingredients
    • A61K31/33—Heterocyclic compounds
    • A61K31/555—Heterocyclic compounds containing heavy metals, e.g. hemin, hematin, melarsoprol
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K31/00—Medicinal preparations containing organic active ingredients
    • A61K31/66—Phosphorus compounds
    • A61K31/661—Phosphorus acids or esters thereof not having P—C bonds, e.g. fosfosal, dichlorvos, malathion or mevinphos
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K31/00—Medicinal preparations containing organic active ingredients
    • A61K31/70—Carbohydrates; Sugars; Derivatives thereof
    • A61K31/7008—Compounds having an amino group directly attached to a carbon atom of the saccharide radical, e.g. D-galactosamine, ranimustine
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P31/00—Antiinfectives, i.e. antibiotics, antiseptics, chemotherapeutics
    • A61P31/04—Antibacterial agents
    • C—CHEMISTRY; METALLURGY
    • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12Q—MEASURING OR TESTING PROCESSES INVOLVING ENZYMES, NUCLEIC ACIDS OR MICROORGANISMS; COMPOSITIONS OR TEST PAPERS THEREFOR; PROCESSES OF PREPARING SUCH COMPOSITIONS; CONDITION-RESPONSIVE CONTROL IN MICROBIOLOGICAL OR ENZYMOLOGICAL PROCESSES
    • C12Q1/00—Measuring or testing processes involving enzymes, nucleic acids or microorganisms; Compositions therefor; Processes of preparing such compositions
    • C12Q1/02—Measuring or testing processes involving enzymes, nucleic acids or microorganisms; Compositions therefor; Processes of preparing such compositions involving viable microorganisms
    • C12Q1/18—Testing for antimicrobial activity of a material
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/30—Against vector-borne diseases, e.g. mosquito-borne, fly-borne, tick-borne or waterborne diseases whose impact is exacerbated by climate change

Definitions

  • This invention relates to uses and methods of preventing or reducing the colonisation of the gastrointestinal tract of an animal with Campylobacter. In particular, it relates to reduction or prevention of colonisation of the gastrointestinal tract of poultry with Campylobacter.
  • Campylobacter are the commonest reported bacterial causes of gastroenteritis in the UK and industrialized world. Campylobacter jejuni ( C. jejuni) is responsible for about 90% of Campylobacter infections, the majority of the remainder being caused by C. coli. Campylobacter form part of the natural gastrointestinal flora of many birds and domestic animals, but chickens are thought to constitute the largest source of human infection. Infected chickens are asymptomatic despite harbouring up to 10 8 colony forming units (cfu) per gram of intestinal content. Meat, in particular chicken meat, is often contaminated with intestinal contents including Campylobacter during slaughter.
  • Cfu colony forming units
  • Campylobacter species cause diseases that vary in severity from mild watery diarrhoea to bloody dysentery. In a small subgroup of patients, the acute phase disease is followed by serious sequelae, including Guillain-Barre syndrome and reactive arthritis.
  • Campylobacter Campylobacteriosis
  • the present invention provides a compound for use in a method of reducing the number of Campylobacter present in the gastrointestinal tract of an animal and thereby disinfecting the animal, wherein the compound is selected from the group consisting of:
  • the present invention also provides for the use of a compound as defined above, for reducing the number of Campylobacter present in the gastrointestinal tract of a non-human animal and thereby disinfecting the animal, by a method comprising administering at least one compound as defined above, in an effective amount to said animal to reduce the number of Campylobacter present in the gastrointestinal tract of said animal, and then slaughtering the animal.
  • the compound is in the form of an animal feed, animal drinking water, feed ingredient or feed supplement that comprises the compound.
  • the present invention also provides a method for reducing the number of Campylobacter present in the gastrointestinal tract of said non-human animal, and thereby disinfecting the animal prior to slaughter, the method comprising: i) administering at least one compound as defined above in an effective amount to said animal to reduce the number of Campylobacter present in the gastrointestinal tract of said animal; and ii) slaughtering the animal.
  • the compound for use is in the form of an animal feed, animal drinking water, feed ingredient or feed supplement that comprises the compound.
  • the present invention in accordance with Claim 1, also provides a compound as defined above for use in a method of preventing or reducing the colonisation of the gastrointestinal tract of animals with Campylobacter.
  • the compound for use is in the form of an animal feed, animal drinking water, feed ingredient or feed supplement that comprises the compound.
  • the present invention also provides for the use of a compound as defined above for preventing or reducing the colonisation of the gastrointestinal tract of non-human animals with Campylobacter, by a method comprising administering at least one compound as defined above to said animal, and then slaughtering the animal.
  • the compound is in the form of an animal feed, animal drinking water, feed ingredient or feed supplement that comprises the compound.
  • the present invention also provides, in accordance with Claim 1, a compound as defined above for use in a method of preventing Campylobacter from forming a biofilm in the gastrointestinal tract of an animal, or reducing the amount of biofilm formed by Campylobacter in the intestinal tract of an animal, and thereby disinfecting the animal.
  • the compound for use is in the form of an animal feed, animal drinking water, feed ingredient or feed supplement that comprises the compound.
  • the present invention also provides for the use of a compound as defined above, for preventing Campylobacter from forming a biofilm in the gastrointestinal tract of a non-human animal, or reducing the amount of biofilm formed by Campylobacter in the intestinal tract of an animal, and thereby disinfecting the animal, by a method comprising administering at least one compound as defined above in an effective amount to said animal to prevent Campylobacter from forming a biofilm in the gastrointestinal tract of said animal or to reduce the amount of biofilm formed by Campylobacter in the intestinal tract of said animal, and then slaughtering the animal.
  • the compound is in the form of an animal feed, animal drinking water, feed ingredient or feed supplement that comprises the compound.
  • the present invention also provides a method for preventing Campylobacter from forming a biofilm in the gastrointestinal tract of a non-human animal, or reducing the amount of biofilm formed by Campylobacter in the intestinal tract of an animal, and thereby disinfecting the animal the method comprising: i) administering at least one compound as defined above in an effective amount to said animal to prevent Campylobacter from forming a biofilm in the gastrointestinal tract of said animal or to reduce the amount of biofilm formed by Campylobacter in the intestinal tract of said animal; and ii) slaughtering the animal.
  • the compound for use in the method is in the form of an animal feed, animal drinking water, feed ingredient or feed supplement that comprises the compound.
  • the present invention also provides a compound as defined above for use in a method of preventing or reducing transmission of Campylobacter infection from one animal to another; wherein the method comprises administering the compound to said animals in an effective amount to prevent said Campylobacter from forming a biofilm in the gastrointestinal tract of said animal or to reduce the amount of biofilm formed by Campylobacter in the intestinal tract of said animal.
  • the compound for use is in the form of an animal feed, animal drinking water, feed ingredient or feed supplement that comprises the compound.
  • the present invention also provides for the use of a compound as defined above for the prevention or reduction of transmission of Campylobacter infection from one non-human animal to another; by a method comprising the administration of the compound to said animals in an effective amount to prevent said Campylobacter from forming a biofilm in the gastrointestinal tract of said animal or to reduce the amount of biofilm formed by Campylobacter in the intestinal tract of said animal, and then slaughtering the animals.
  • the compound is in the form of an animal feed, animal drinking water, feed ingredient or feed supplement that comprises the compound.
  • the present invention also provides, in accordance with Claim 7, a method for preventing or reducing transmission of Campylobacter infection from one non-human animal to another prior to slaughter, for example preventing or reducing spread of Campylobacter infection within a flock or herd of animals, for example preventing spread of Campylobacter infection within a flock of chickens; said method comprising administering to said animals, for example said herd or flock of animals, for example said flock of chickens, at least one compound as defined above in an effective amount to prevent said Campylobacter from forming a biofilm in the gastrointestinal tract of said animal or to reduce the amount of biofilm formed by Campylobacter in the intestinal tract of said animal; and slaughtering the animals.
  • the uses and methods of the present invention may allow disinfection, prevention of biofilm formation and reduction of transmission of Campylobacter between animals by preventing or reducing adherence of Campylobacter to the gastrointestinal tract of said animals.
  • This is advantageous because the fewer Campylobacter that are in the gastrointestinal tract of an animal at the time of slaughter, the lower the risk of contamination of meat from the animal with Campylobacter.
  • the fewer Campylobacter that are in the gastrointestinal tract of an animal the lower the chance of the Campylobacter forming a biofilm in the gastrointestinal tract of the animal.
  • the fewer Campylobacter that are in the gastrointestinal tract of an animal the lower the chance that the Campylobacter will spread from one animal to another, for example within a herd or flock of animals.
  • Uses and methods of the present invention may be used to reduce the amount of colonisation of the gastrointestinal tract of any animal with Campylobacter. It is particularly advantageous to provide the compounds to animals that will be slaughtered for human consumption, such as, for example, cattle, sheep, pigs, goats, deer, fish, shellfish and poultry. Poultry includes birds that are used for human consumption such as chickens, geese, turkeys and ducks. It is particularly advantageous to use the compounds of the present invention to reduce or prevent colonisation of the gastrointestinal tract of poultry, in particular chickens, with Campylobacter because chickens are a leading source of human infection with Campylobacter.
  • Campylobacter are gram negative, spiral rod shaped bacteria with a single flagellum at one or both poles. They belong to the epsilon proteobacteria class and are closely related to Helicobacter and Wolinella. Although these species are related they have very different culture requirements and different hosts. Campylobacter species usually live in the gut of animals, in particular chickens while Helicobacter lives in the stomach of humans. Although fastidious in their culture requirements, Campylobacter species, particularly C. jejuni and C. coli, are important human pathogens, causing gastroenteritis of varying severity. Under normal circumstances gastroenteritis is self-limiting, but sequelae associated with campylobacteriosis such as Guillain-Barre syndrome are potentially life threatening. There are many different reservoirs for Campylobacter but the most significant is contaminated meat, particularly poultry.
  • the number of Campylobacter in the gastrointestinal tracts of animals may be reduced by the uses and methods of the present invention.
  • the number of colony forming units (cfu) of Campylobacter in the gastrointestinal tract of an animal treated with the compounds of the present invention may be reduced by 50%, by 60%, by 70%, by 80%, by 90% or by 100%.
  • Campylobacter may be substantially eradicated from the gastrointestinal tract of animals treated by the uses or method of the present invention.
  • 10000 cfu of Campylobacter are enough for successful chicken colonization. 1000 cfu of Campylobacter are enough to infect a human and cause disease in a human. Therefore, an effective amount of a compound of the present invention is enough of the compound to reduce the number of Campylobacter in the gastrointestinal tract of an animal to a number that is unlikely to cause infection in humans.
  • the number of cfu of Campylobacter that would be ingested by a human if they ate meat from an infected animal may be related to the number of Campylobacter in the gastrointestinal tract of the animal at the time of slaughter but also depends on other factors such as the amount of contamination of the meat with the contents of the gastrointestinal tract of the animal at the time of slaughter.
  • An effective amount of the compound of the present invention is enough of the compound to prevent colonisation of the gastrointestinal tract of the animal with Campylobacter.
  • the compounds of the present invention may make Campylobacter less virulent and less capable of infecting humans even if the total number of Campylobacter in the gastrointestinal tract does not decrease.
  • administering a compound of the present invention to an animal may affect the metabolism of Campylobacter and make them less adaptive to the environment so that they can not colonize the gastrointestinal tract and are less likely to be transmitted to the other animals or to humans.
  • An effective amount of a compound provided to an animal should be enough to provide the required degree of reduction of Campylobacter colonisation. This may depend on the type of compound and/or the size of the animal. In one embodiment an effective amount of the compound may be 0.3 to 32 mg/day/kg bodyweight of the animal.
  • the uses and methods of the present invention preferably reduces colonisation of the gastrointestinal tract with Campylobacter species, for example Campylobacter jejuni or Campylobacter coli.
  • Campylobacter jejuni is the commonest reported bacterial cause of gastroenteritis in the UK and industrialized world. Campylobacter jejuni ( C. jejuni) is responsible for about 90% of Campylobacter infections, the majority of the remainder being caused by C. coli. Campylobacter form part of the natural gastrointestinal flora of many birds and domestic animals and there is therefore a high risk of contamination of the carcasses of these animals when they are slaughtered.
  • the compound used in the uses and methods of the present invention is preferably a compound that blocks the interaction of MOMP or FlaA on the surface of Campylobacter with the cells of gastrointestinal tract.
  • the compound binds to MOMP or FlaA and competitively or non-competitively inhibits the binding of MOMP or FlaA on the Campylobacter with the cells of the gastrointestinal tract.
  • the compound used in the present invention may bind to MOMP on the surface of Campylobacter jejuni.
  • the compound used in the method of the present invention specifically binds to at least one of amino acid residues Arg 352 , Lys 278 , Lys 385 , Asn 258 , Leu 290 , Tyr 294 , Phe 395 Ile 337 , Arg 381 , Asp 261 and Ser 397 of MOMP.
  • the compound of the present invention reduces the interaction between at least one of amino acid residues Arg 352 , Lys 278 , Lys 385 , Asn 258 , Leu 290 , Tyr 294 , Phe 395 Ile 337 , Arg 381 , Asp 261 and Ser 397 of MOMP and the gastrointestinal tract of an animal.
  • the compound used in the uses and methods of the present invention may be ferric quinate.
  • the compound used in the uses and methods of the present invention may have one of the following structures:
  • the compound used in the uses and method of the present invention may be administered orally. This is advantageous because it is easy to administer compounds orally to animals. Oral administration is also a preferred method of administering a compound to ensure that it reaches the gastrointestinal tract.
  • the compound may be administered in an animal's feed or drinking water.
  • the compound may be administered to the animal at any time during its lifetime.
  • the compound is administered to the animal at least once a day for a period of time before slaughter of the animal.
  • the compound may be administered to the animal for between 1 and 10 days, preferably for between 1 and 8 days, between 1 and 6 days, between 1 and 4 days, before slaughter or for 2 or 1 days.
  • a single dose of the compound may be administered to the animal between 1 and 4 days before slaughter.
  • the compound may be administered to the animal every day for 3 days, 4 days or 5 days before slaughter. Chickens are often colonized by Campylobacter between 7 and 10 days before slaughter.
  • the compound may be administered to a chicken less than 10 days before slaughter to disinfect the chicken and reduce colonisation of the gastrointestinal tract of the chicken before slaughter.
  • the compound of the present invention may be administered to an animal before colonisation of the gastrointestinal tract of the animal with Campylobacter in order to prevent colonisation of the gastrointestinal tract of the animal with Campylobacter.
  • the compound of the present invention is administered to a chicken more than 10 days before slaughter to prevent transmission of Campylobacter within a flock of chickens.
  • the compound may be administered to an animal at a dosage of 0.3-32 mg/day/kilo as a solution having a range of concentration from 34-340 ⁇ M (0.02-0.2 g/L).
  • a concentration of 0.2g/L has an effect on colonization during the first three days post-infection and also on the binding of Campylobacter to blood group antigens which may be reduced by 60%.
  • the compound may be administered at a concentration of 2g/L, which may prevent Campylobacter colonisation of the gastrointestinal tract of the animal and/or reduce the number of Campylobacter in the gastrointestinal tract of the animal to substantially zero.
  • the present invention also provides, in accordance with Claim 18, the use of a compound as defined above for reducing the amount of Camplyobacter in meat by a method comprising the steps of: providing a non-human animal, or a flock or herd of non-human animals, with a compound as defined above; and preparing a meat product from the animal.
  • the compound is in the form of an animal feed, animal drinking water, feed ingredient or feed supplement that comprises the compound.
  • the present invention also provides a method for reducing the amount of Campylobacter in meat comprising the steps of: Providing a non-human animal, or a flock or herd of non-human animals, with a compound as defined above; and preparing a meat product from the animal.
  • the animal may be any type of animal, preferably a poultry bird, preferably a chicken.
  • animal feed may be included in animal feed, as a feed ingredient or as a feed supplement.
  • the animal feed, feed ingredient or feed supplement may be suitable for any animal, in particular animals that are to be slaughtered for human consumption, preferably poultry, more preferably chickens.
  • Compounds as defined above that are useful in the uses and methods of the present invention may be provided to an animal in liquid or solid form or as a powder. They may be included as an ingredient in feed or animal food or as an ingredient in a feed or food supplement. In one embodiment the compounds are provided to chickens in chicken feed or as a feed ingredient mixed with chicken feed.
  • a feed may be a food intended for or suitable for consumption by animals.
  • a food or a foodstuff may be a food that is intended or suitable for consumption by humans.
  • the present invention also provides, in accordance with Claim 23, an animal feed, comprising a compound as a feed ingredient or as a feed supplement, wherein the animal feed is a food intended for or suitable for consumption by animals, and the compound is: a complex of tyrosine with Fe III wherein the animal feed comprises the compound in an amount effective to reduce or prevent the colonisation of the gastrointestinal tract of an animal with Campylobacter.
  • the present invention also provides, in accordance with Claim 24, an oral composition, animal feed or animal drinking water, comprising a compound that is: a complex of 3,4 dihydroxyphenylalanine with Fe III wherein the oral composition, animal feed, or animal drinking water comprises the compound in an amount effective to reduce or prevent the colonisation of the gastrointestinal tract of an animal with Campylobacter.
  • the present invention also provides for the use of a compound, as defined by Claim 23 or 24, as a feed supplement or feed ingredient, in the manufacture of an animal feed, or as an additive in the manufacture of animal drinking water, as defined above.
  • the present invention also provides a method for the manufacture of an animal feed or animal drinking water as defined above, wherein the method comprises the use of a compound, as defined by Claim 23 or 24, as a feed supplement or feed ingredient in the manufacture of the animal feed, or as an additive in the manufacture of animal drinking water.
  • the present invention provides, in accordance with Claim 29, a method of disinfecting a foodstuff or a food comprising administering a compound as defined above in an effective amount to the foodstuff to reduce the amount of Camylobacter in the foodstuff.
  • the present invention also provides for the use of a compound as defined above for disinfecting a foodstuff, by administering an effective amount of the compound to the foodstuff to reduce the amount of Campylobacter in the foodstuff.
  • a foodstuff or a food may be for human consumption, in particular the food may be a meat product, for example a fresh meat product, a processed meat product, a chilled meat product, a frozen meat product or a cooked meat product.
  • the meat product may be, for example a beef, lamb, pork, duck, chicken, goose, turkey, rabbit, fish or shellfish meat product.
  • the meat product may be a poultry meat product, more preferably a chicken meat product.
  • the present invention also provides a compound as defined above for use in the prophylaxis or treatment of Campylobacter infection in humans.
  • a compound as defined above may be used in the manufacture of a medicament for the prophylaxis or treatment of Campylobacter infection in humans.
  • the compound may be provided to humans to prevent or treat infection of humans with Campylobacter (campylobacteriosis). This is advantageous because the compounds prevent or reduce adhesion of Campylobacter to the epithelial cells in the gastrointestinal tract. This may prevent or reduce infection with Campylobacter because Campylobacter adheres to cells in the human gastrointestinal tract by docking onto human histo-blood group antigens that are expressed on the cells of the gastrointestinal tract. The compounds may compete with natural human histo-blood group antigens that are on the epithelial cells for binding of MOMP and FlaA and therefore reduce the amount of binding of Campylobacter to the cells.
  • Campylobacter campylobacteriosis
  • the present application also discloses a method of treating or preventing Campylobacter infection in humans comprising administering to the human an effective amount of a compound as defined above.
  • the present application also discloses a kit comprising:
  • Campylobacter jejuni is an important cause of human food-borne gastroenteritis.
  • C. jejuni infection Despite the high prevalence and medical importance of C. jejuni infection, fundamental aspects of pathogenesis remain poorly understood, in particular the detailed molecular interactions between host and pathogen.
  • Human histo-blood group antigens BgAgs
  • BgAgs Human histo-blood group antigens
  • the corresponding surface-exposed BgAgs-binding adhesins of C. jejuni were identified as the major subunit protein of the flagella (FlaA) and the major outer membrane protein (MOMP). O -glycosylation of FlaA has previously been reported, and is required for filament assembly and for modulating flagella functionality.
  • O -glycosylation was localised to Thr 268 and suggested as Gal ⁇ 1-3 -(GalNAc) 3 - ⁇ 1-Thr 268 .
  • Site-directed substitution of MOMP Thr 268 /Gly led to a significant reduction in binding to BgAgs.
  • molecular dynamics (MD) simulation modelling techniques suggested that O -glycosylation of MOMP has a notable effect on the conformation of the protein.
  • C. jejuni uses O -glycosylation of surface-exposed proteins to modulate the conformation and binding capability.
  • C. jejuni specifically bind all human BgAgs, and identified the bacterial ligands responsible for binding. These are the flagellin protein FlaA and the major outer membrane protein MOMP.
  • MOMP is O -glycosylated, and shares a common BgAg binding site with FlaA, which has already been shown to be O -glycosylated.
  • Glycosylation of MOMP causes it to undergo conformational changes which alters its affinity for binding of, and hence recognition of, BgAgs compared with unglycosylated MOMP protein.
  • Conformational MOMP epitopes are important in host immunity, and variation in surface-exposed regions probably occurs as a result of positive immune selection during infection. Identification of the protein glycosylation profile of C . jejuni, in the outer membrane is helpful in understanding the diverse pathogenicity of C. jejuni strains among different hosts.
  • the present studies have created an in silico model of glycosylated MOMP, which have been used to identify the amino acids which mediate the bacterial binding to BgAgs.
  • the model and the amino acids that are essential for binding to BgAgs may be used to identify candidate drug targets.
  • the model may also be used to predict which molecules will bind to MOMP and can reduce the adhesion of the Campylobacter carrying MOMP to cell walls.
  • BgAgs can inhibit bacterial adhesion and biofilm formation and have identified molecules that can be used (a) for treatment of humans suffering from Campylobacteriosis; (b) to prevent colonisation of chickens with Campylobacter ssp ; and (c) to eliminate chicken colonisation in infected flocks.
  • Ferric Quinate (Fe-Q) may be used in the present invention.
  • jejuni binds a wide range of human BgAgs.
  • Blood group antigens were obtained from IsoSep (Sweden).
  • the lab strain (ATCC11168) was obtained from ATCC bank and the clinical strains from a collection belong to Prof. Julian M. Ketley (Department of Genetics, University of Leicester, Leicester LE1 7RH, UK).
  • H. pylori BgAg-binding adhesions The high degree of specificity by H. pylori BgAg-binding adhesions is in contrast to our findings with C. jejuni, which appears to bind to a wide range of related antigens. This may reflect the fact that H. pylori has a very restricted host range (infecting only humans), whereas C. jejuni is able to establish infection in a wide range of birds and mammals and may have gained an evolutionary advantage by broadening its specificity and maximising its survival in different hosts.
  • C. jejuni FlaA and MOMP mediate the binding to a wide range of human BgAgs.
  • MOMP major outer-membrane protein
  • FlaA the major flagella component, 59 kDa
  • the C. jejuni MOMP is a multifunctional porin and is essential for bacterial survival; it is predicted to comprise outer membrane-spanning beta stands separating periplasmic and surface-exposed loops. That it is encoded by the porA gene which is extremely genetically diverse and the variability of the porA surface loops provides evidence that immune selection strongly influences the diversity of this protein. Interestingly, the greatest variation in both putative amino acid sequence and length was formed in loop 4.
  • MOMP was purified under native conditions from strain NCTC11168 and inhibition ELISA and confocal experiments showed that both purified MOMP and H-II significantly inhibited binding of NCTC11168 to H-II antigen ( Fig. 2A ).
  • Ferric Quinate an inhibitor for C. jejuni adherence
  • phenolic compounds including caffeic and quinic acids (Baqar et al .) have been shown to have high levels of antioxidant activity and other potentially health-promoting effects in vitro.
  • quinic acid occurs in tea, coffee, fruits and vegetables.
  • plants use the low molecular mass D-(-)-quinic acid (Baqar et al .) for mobilization of iron and further use of this metal by cellular structures in metabolic pathways (Menelaou et al., 2009).
  • Ferric quinate Fe(QA)3 was identified as having promising inhibitory effects in vitro and in vivo on C. jejuni adhesion to BgAgs.
  • the complex reduced significantly the adhesion of C. jejuni (2-3 Log at 0.34 mM concentration) to the intestinal mucosa and epithelial lining by inhibiting the binding between bacterial adhesins, such as MOMP (confirmed by model), may FlaA, and the corresponding binding sites in the host intestinal epithelium see Figures 14 and 15 .
  • MOMP is O -glycosylated.
  • Campylobacter specifically modify their flagellar proteins with O -linked glycans that can constitute up to 10% of the protein mass. These modifications are necessary for flagellum assembly, and thus affect secretion of virulence-modulating proteins, bacterial colonization of the gastrointestinal tract, autoagglutination and biofilm formation.
  • MOMP was purified from strains NCTC11168 and Cj-281 under native conditions and analysed by Nanoflow LC-MS/MS FT/ICR following in-gel protein digestion as described in A. Shevchenko, M. Wilm, O. Vorm, M. Mann, Anal Chem 68, 850 (Mar 1, 1996 ).
  • Flagellin is the only O -glycosylated C . jejuni protein to have been reported and glycans constitute ca. 10% to this protein's weight.
  • the predominant O -glycans attached to the Campylobacter flagellum are derivatives of pseudaminic acid or legionaminic acid , which are C9 sugars that are related to sialic acids.
  • the related human gastric pathogen H. pylori also O -glycosylates its flagella with Pse, similarly to C . jejuni, and modification is required for bacterial motility and flagellar assembly.
  • PseD as a putative PseAm transferase showed that mutation in pseD lacked PseAm on flagellin and failed to auto-agglutinate.
  • Pgl protein glycosylation pathway
  • PglB is critical for protein N -glycosylation i.e. transfer of the first glycan molecules to the target proteins at specific Asn residues.
  • C. jejuni strain NCTC11168 encodes a transferase that is involved in post-translational modification of protein, which plays an important role in bacterial adhesion and reveals unusual post-translational modifications; an O -linked Hex-(HexNAc) 3 at Thr 268 .
  • These post-translational modifications might undergo phase variation and may also vary in structure from one generation of C. jejuni to the next, and have a function in immune escape.
  • these findings provide new insights into MOMP structure and resolve long-standing issues regarding the adhesion molecules which mediate the bacterial binding to the BgAgs. The pathogenesis and study of the effects on processes such as colonization, invasion, and the ability to stimulate the host inflammatory response remain to be elucidated.
  • Lectin kit was used for determination of the MOMP glycosylation constituent.
  • the kit consists of 7 different lectins with overlapping specificity.
  • the purified NCTC11168-MOMP in lectin array revealed significant binding to Jacalin lectin and in a lesser extent to GSL and LEL ( Fig. 3D ).
  • the lectin from Artocarpus integrifolia known in the literature as Jacalin, exhibits specificity toward human tumour specific Thomsen-Friedenreich disaccharide (T-antigen, Gal ⁇ 1-3 GalNAc ⁇ 1 -Ser/Thr).
  • the initial structure was constructed and showed to have 9 loops and 18 beta-strands.
  • the lowest energy structure obtained from molecular dynamics (MD) simulations at 300 Kelvin (K). This structure was glycosylated at residue 268 with a glycosyl group.
  • the lowest energy structure of glycosylated MOMP (gly-MOMP) obtained from MD simulations was superimposed on the lowest energy structure of MOMP to see the conformational changes induced by the introduction of glycosylation as presented in Figure 4B . It shows that the major changes occur in loops 4, 6 and 7 constructed roughly of 169-200, 256-274 and 296-333 residues where loop 6 bears the glycosyl group. However, it shows that a small change appears in the barrels.
  • the MOMP protein has a canal-like cavity, which is expected to be capable of accommodating very large molecules.
  • a mimic of Lewis antigen, type-1 Lewis carbohydrate determinant (Le b ) and type-2 H-II antigen were docked into the cavity of MOMP and gly-MOMP. These complexes were computed for MD simulations.
  • the introduction of the ligands within the cavity of MOMP leads to a remarkable effect on conformational changes in the loops, especially in loops 4 and 7. These two loops are the longest among the rest and obviously undergo significant conformational changes compared with others.
  • gly-MOMP has a relatively stable structure since it shows that only loop 7 slightly undergoes conformational changes upon this complex. This may mean that glycosylation enhances the stability of the protein and allow it to be immunologically inert through molecular mimicry of its host.
  • the residues 352 and 385 are the members of the beta-barrel 7, which are the part of loop 7.
  • This loop as mentioned earlier, mostly undergoes conformation changes during the molecular dynamic simulation ( Fig. 4B ).
  • the glycosyl group interacts with this loop, thus leading to favourable conformational change for the interaction, and consequently resulting in a well-orientation of these residues to interact with Le b .
  • the glycosyl group is sandwiched between loops 4 and 7, probably influencing the dynamics of these loops, thus contributing to the binding ability of the protein. Calculations also show that the glycosylated protein has more favourable van der Waals (vdw) interactions compared with MOMP.
  • the other outcome gathered from MD calculations is the conformation and alignment of the ligands within the cavities of two proteins. They show that both ligands have different conformational orientations in the active sites of the proteins.
  • the model for C. jejuni interaction to Le b and H-II antigens mediated by MOMP generated here substantially increases our knowledge about the protein and its glycosylation and the role in interactions detected thus far for the C. jejuni outer membrane.
  • the structural glycobiology will play a key role in unravelling other glycan structures that mediate the host-bacteria interaction through MOMP/FlaA proteins, contributing decisively for identification and validation of new glycan receptors for these bacterial lectins. This information will be of major importance for the improvement and design of new therapies to overcome the C. jejuni infection.
  • AAG Auto-agglutination

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Claims (34)

  1. Composé destiné à être utilisé dans un procédé choisi parmi :
    un procédé de réduction du taux de Campylobacter présents dans le tractus gastro-intestinal d'un animal afin de le désinfecter ;
    un procédé de prévention ou de réduction de la colonisation du tractus gastro-intestinal des animaux infectés par Campylobacter; ou
    un procédé permettant d'empêcher le Campylobacter de former un biofilm dans le tractus gastro-intestinal d'un animal ou de réduire la quantité de biofilm formé par le Campylobacter dans le tractus intestinal d'un animal, afin de désinfecter l'animal ; dans lequel le composé est destiné à être utilisé éventuellement sous la forme d'un aliment pour animaux, de l'eau d'abreuvement, d'un ingrédient alimentaire ou d'un complément alimentaire qui comprend le composé, et dans lequel le composé est choisi dans le groupe constitué par :
    a) un complexe de tyrosine avec Fe III ;
    Figure imgb0142
    b) du quinate ferrique ; et
    c) un complexe de 3,4-dihydroxyphénylalanine avec Fe III.
    Figure imgb0143
  2. Utilisation d'un composé tel que défini dans la revendication 1, dans laquelle le composé, lors de son utilisation, se présente éventuellement sous la forme d'un aliment pour animaux, de l'eau d'abreuvement, d'un ingrédient alimentaire ou d'un complément alimentaire contenant le composé ;
    ladite utilisation étant choisie parmi les possibilités d'utilisation suivantes :
    pour la réduction du taux de Campylobacter présents dans le tractus gastro-intestinal d'un animal non humain afin de le désinfecter, par un procédé comprenant l'administration audit animal d'au moins un composé en une quantité efficace, tel que défini dans la revendication 1, dans le but de réduire le taux de Campylobacter présent dans le tractus gastro-intestinal dudit animal, avant l'abattage de l'animal ;
    pour la prévention ou la réduction de la colonisation du tractus gastro-intestinal d'animaux non humains par le Campylobacter, par un procédé comprenant l'administration audit animal d'au moins un composé tel que défini dans la revendication 1, avant l'abattage de l'animal ; ou
    pour empêcher le Campylobacter de former un biofilm dans le tractus gastro-intestinal d'un animal non humain, ou pour réduire la quantité de biofilm formé par le Campylobacter dans le tractus intestinal d'un animal non humain afin de désinfecter l'animal, par un procédé comprenant l'administration audit animal d'au moins un composé en une quantité efficace, tel que défini dans la revendication 1, dans le but d'empêcher le Campylobacter de former un biofilm dans le tractus gastro-intestinal dudit animal ou pour réduire la quantité de biofilm formé par le Campylobacter dans le tractus intestinal dudit animal, avant l'abattage de l'animal.
  3. Procédé de réduction du taux de Campylobacter présents dans le tractus gastro-intestinal d'un animal non humain afin de désinfecter celui-ci avant l'abattage, le procédé comprenant :
    i) l'administration audit animal d'au moins un composé en une quantité efficace, tel que défini par la revendication 1, dans le but de réduire le taux de Campylobacter présents dans le tractus gastro-intestinal dudit animal, le composé à utiliser étant éventuellement sous la forme d'un aliment pour animaux, de l'eau d'abreuvement, d'un ingrédient alimentaire ou d'un complément alimentaire contenant le composé ; et
    ii) l'abattage de l'animal.
  4. Procédé permettant d'empêcher le Campylobacter de former un biofilm dans le tractus gastro-intestinal d'un animal non humain, ou de réduire la quantité de biofilm formé par le Campylobacter dans le tractus intestinal dudit animal afin de désinfecter l'animal avant l'abattage, le procédé comprenant :
    i) l'administration audit animal d'au moins un composé en une quantité efficace, tel que défini dans la revendication 1, dans le but d'empêcher le Campylobacter de former un biofilm dans le tractus gastro-intestinal dudit animal ou pour réduire la quantité de biofilm formé par le Campylobacter dans le tractus intestinal dudit animal, le composé à utiliser se présentant éventuellement sous la forme d'un aliment pour animaux, de l'eau d'abreuvement, d'un ingrédient alimentaire ou d'un complément alimentaire contenant le composé ; et
    ii) l'abattage de l'animal.
  5. Composé tel que défini par la revendication 1, destiné à être utilisé dans un procédé de prévention ou de réduction de la transmission de l'infection par Campylobacter d'un animal à un autre, dans lequel le composé destiné à être utilisé se présente éventuellement sous la forme d'un aliment pour animaux, de l'eau d'abreuvement, d'un ingrédient alimentaire ou d'un complément alimentaire contenant le composé ; et
    le procédé comprenant l'administration du composé en une quantité efficace audits animaux, dans le but d'empêcher le Campylobacter de former un biofilm dans le tractus gastro-intestinal desdits animaux ou pour réduire la quantité de biofilm formé par le Campylobacter dans le tractus intestinal desdits animaux.
  6. Utilisation d'un composé tel que défini par la revendication 1, pour la prévention ou la réduction de la transmission de l'infection par Campylobacter d'un animal non humain à un autre, dans laquelle le composé, lors de son utilisation, se présente éventuellement sous la forme d'un aliment pour animaux, de l'eau d'abreuvement, d'un ingrédient alimentaire ou d'un complément alimentaire contenant le composé ;
    par un procédé comprenant l'administration du composé en une quantité efficace audits animaux, dans le but d'empêcher ledit Campylobacter de former un biofilm dans le tractus gastro-intestinal desdits animaux ou pour réduire la quantité de biofilm formé par le Campylobacter dans le tractus intestinal desdits animaux avant l'abattage des animaux.
  7. Procédé de prévention ou de réduction de la transmission de l'infection par Campylobacter d'un animal non humain à un autre avant l'abattage, le procédé comprenant :
    i) l'administration audits animaux d'au moins un composé en une en quantité efficace, tel que défini dans la revendication 1, dans le but d'empêcher ledit Campylobacter de former un biofilm dans le tractus gastro-intestinal desdits animaux ou pour réduire la quantité de biofilm formé par Campylobacter dans le tractus intestinal desdits animaux, le composé à utiliser se présentant éventuellement sous la forme d'un aliment pour animaux, de l'eau d'abreuvement, d'un ingrédient alimentaire ou d'un complément alimentaire contenant le composé ; et
    ii) l'abattage des animaux.
  8. Composé destiné à être utilisé selon la revendication 5, utilisation selon la revendication 6 ou procédé selon la revendication 7, pour la prévention ou la réduction de la propagation de l'infection par Campylobacter dans un cheptel ou un troupeau d'animaux, par exemple pour la prévention de la propagation de l'infection par Campylobacter dans un troupeau de poulets.
  9. Composé destiné à être utilisé selon la revendication 1, 5 ou 8, utilisation selon la revendication 2, 6 ou 8, ou procédé selon la revendication 3, 4, 7 ou 8, dans lequel/laquelle le Campylobacter est un Campylobacter jejuni ou un Campylobacter coli.
  10. Composé destiné à être utilisé selon la revendication 1, 5, 8 ou 9, utilisation selon la revendication 2, 6, 8 ou 9, ou procédé selon la revendication 3, 4, 7, 8 ou 9, dans lequel/laquelle le composé est un complexe de tyrosine avec Fe III.
    Figure imgb0144
  11. Composé destiné à être utilisé selon la revendication 1, 5, 8 ou 9, utilisation selon la revendication 2, 6, 8 ou 9, ou procédé selon la revendication 3, 4, 7, 8 ou 9, dans lequel/laquelle le composé est le quinate ferrique.
  12. Composé destiné à être utilisé selon la revendication 1, 5, 8 ou 9, utilisation selon la revendication 2, 6, 8 ou 9, ou procédé selon la revendication 3, 4, 7, 8 ou 9, dans lequel/laquelle le composé est un complexe de 3,4-dihydroxyphénylalanine avec Fe III.
    Figure imgb0145
  13. Composé destiné à être utilisé selon les revendications 1, 5, 8 ou 9 à 12, utilisation selon la revendication 2, 6, 8 ou 9 à 12, ou procédé selon les revendications 3, 4, 7, 8 ou 9 à 12, dans lequel/laquelle le composé est administré par voie orale.
  14. Composé destiné à être utilisé selon les revendications 1, 5, 8 ou 9 à 13, utilisation selon les revendications 2, 6, 8 ou 9 à 13, ou procédé selon les revendications 3, 4, 7, 8 ou 9 à 13, dans lequel/laquelle le composé est administré à l'animal à travers l'aliment pour animaux ou l'eau d'abreuvement.
  15. Composé destiné à être utilisé selon les revendications 1, 5, 8 ou 9 à 14, utilisation selon les revendications 2, 6, 8 ou 9 à 14, ou procédé selon les revendications 3, 4, 7, 8 ou 9 à 14, dans lequel/laquelle l'animal est un animal non humain et le composé est administré quotidiennement entre 1 et 10 jours ou entre 3 et 5 jours avant l'abattage de l'animal.
  16. Composé destiné à être utilisé selon les revendications 1, 5, 8 ou 9 à 14, utilisation selon les revendications 2, 6, 8 ou 9 à 14, ou procédé selon les revendications 3, 4, 7, 8 ou 9 à 14, dans lequel/laquelle le composé est administré à un poulet pendant plus de 10 jours avant l'abattage pour empêcher la transmission du Campylobacter dans un troupeau de poulets.
  17. Composé destiné à être utilisé selon les revendications 1, 5, 8 ou 9 à 16, utilisation selon les revendications 2, 6, 8 ou 9 à 16, ou procédé selon les revendications 3, 4, 7, 8 ou 9 à 16, dans lequel/laquelle le composé est administré en une quantité comprise entre 0,3 et 32 mg/jour/poids de l'animal en kilos.
  18. Utilisation d'un composé tel que défini dans l'une des revendications 1, 10, 11 ou 12 pour réduire la quantité de Campylobacter dans la viande par un procédé comprenant les étapes consistant à :
    i) administrer un composé à un animal non humain ou à un cheptel ou troupeau d'animaux non humains, tel que défini dans l'une des revendications 1, 10, 11 ou 12 ; et
    ii) préparer un produit de viande de l'animal ; et
    dans lequel le composé, lors de son utilisation, se présente éventuellement sous la forme d'un aliment pour animaux, de l'eau d'abreuvement, d'un ingrédient alimentaire ou d'un complément alimentaire contenant le composé.
  19. Procédé de réduction de la quantité de Campylobacter dans la viande, comprenant les étapes consistant à :
    i) administrer un composé à un animal non humain ou à un cheptel ou troupeau d'animaux non humains, tel que défini dans l'une des revendications 1, 10, 11 ou 12, le composé à utiliser étant éventuellement sous la forme d'un aliment pour animaux, de l'eau d'abreuvement, d'un ingrédient alimentaire ou d'un complément alimentaire contenant le composé ; et
    ii) préparer un produit de viande de l'animal.
  20. Composé destiné à être utilisé selon les revendications 1, 5, 8 ou 9 à 17, utilisation selon les revendications 2, 6, 8 ou 9 à 17, ou procédé selon les revendications 3, 4, 7, 8 ou 9 à 17, utilisation selon la revendication 18, ou procédé selon la revendication 19, dans lequel/laquelle l'animal est choisi parmi les bovins, les ovins, les porcins, les caprins, les cervidés, les poissons, les crustacés et la volaille.
  21. Composé destiné à être utilisé, utilisation, ou procédé selon la revendication 20, dans lequel/laquelle l'animal est un oiseau de volaille, tel qu'un poulet, une oie, une dinde ou un canard, et de préférence un poulet.
  22. Composé destiné à être utilisé, utilisation, ou procédé selon la revendication 20 ou 21, dans lequel/laquelle l'animal fait partie d'un cheptel ou troupeau.
  23. Aliment pour animaux contenant un composé comme ingrédient alimentaire ou comme complément alimentaire, l'aliment pour animaux étant un aliment destiné ou propre à la consommation par les animaux, et le composé étant :
    un complexe de tyrosine avec Fe III
    Figure imgb0146
     et
    l'aliment pour animaux comprenant le composé en une quantité efficace pour réduire ou empêcher la colonisation du tractus gastro-intestinal d'un animal par le Campylobacter.
  24. Composition orale, aliment pour animaux ou eau d'abreuvement, contenant un composé qui est un complexe de 3,4-dihydroxyphénylalanine avec Fe III
    Figure imgb0147
     la composition orale, l'aliment pour animaux ou l'eau d'abreuvement contenant le composé en une quantité efficace pour réduire ou empêcher la colonisation du tractus gastro-intestinal d'un animal par le Campylobacter.
  25. Aliment pour animaux selon la revendication 23, ou composition orale, aliment pour animaux ou eau d'abreuvement selon la revendication 24, lequel/laquelle est destiné(e) à un animal choisi parmi les bovins, les ovins, les porcins, les caprins, les cervidés, les poissons, les crustacés et la volaille.
  26. Aliment pour animaux selon la revendication 23, ou composition orale, aliment pour animaux ou eau d'abreuvement selon la revendication 24, lequel/laquelle est destiné(e) à un oiseau de volaille, tel qu'un poulet, une oie, une dinde ou un canard, et de préférence un poulet.
  27. Utilisation d'un composé, tel que défini dans la revendication 23 ou 24, comme complément alimentaire ou ingrédient alimentaire dans la préparation d'un aliment pour animaux ou comme additif dans la préparation de l'eau d'abreuvement.
  28. Procédé de préparation d'un aliment pour animaux ou de l'eau d'abreuvement, le procédé comprenant l'utilisation d'un composé tel que défini dans la revendication 23 ou 24, comme complément alimentaire ou ingrédient alimentaire dans la préparation de l'aliment pour animaux, ou comme additif dans la préparation de l'eau d'abreuvement.
  29. Procédé de désinfection d'un produit alimentaire, comprenant l'administration au produit alimentaire d'un composé en une quantité efficace tel que défini dans l'une des revendications 1, 10, 11 ou 12, afin de réduire la quantité de Campylobacter dans le produit alimentaire.
  30. Utilisation d'un composé tel que défini dans l'une des revendications 1, 10, 11 ou 12 pour désinfecter un produit alimentaire, en administrant une quantité efficace du composé au produit alimentaire afin de réduire la quantité de Campylobacter dans le produit alimentaire.
  31. Procédé selon la revendication 29 ou utilisation selon la revendication 30, dans lequel/laquelle le produit alimentaire est un aliment destiné à la consommation humaine.
  32. Procédé selon la revendication 29 ou 31, ou utilisation selon la revendication 30 ou 31, dans lequel/laquelle le produit alimentaire est un produit de viande, par exemple un produit de viande fraîche, un produit de viande transformée, un produit de viande réfrigérée, un produit de viande congelée ou un produit de viande cuite.
  33. Procédé ou utilisation selon la revendication 32, dans lequel/laquelle le produit de viande est choisi parmi un produit de viande de boeuf, d'agneau, de porc, de canard, de poulet, d'oie, de dinde, de lapin, de poisson ou de crustacés.
  34. Composé tel que défini dans l'une des revendications 1, 10, 11 ou 12, destiné à être utilisé dans la prophylaxie ou le traitement de l'infection par Campylobacter chez l'homme.
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CA2957790A1 (fr) 2014-08-13 2016-02-18 Akeso Biomedical, Inc. Composes et compositions antimicrobiens ainsi que leurs utilisations
US10653658B2 (en) 2015-08-11 2020-05-19 Akeso Biomedical, Inc. Biofilm inhibiting compositions enhancing weight gain in livestock
DK3334440T3 (en) * 2015-08-11 2021-07-26 Akeso Biomedical Inc Biofilm inhibiting compositions enhancing weight gain in livestock
HUE052315T2 (hu) 2017-08-24 2021-04-28 Evonik Operations Gmbh A gasztrointesztinális traktus campylobacter általi kolonizációjának csökkentése
NL2022942B1 (en) * 2019-04-15 2020-10-22 Intracare Bv Use of iron chelate to reduce gastrointestinal tract colonisation by campylobacter
CN110218160B (zh) * 2019-06-19 2022-05-24 暨南大学 一种奎宁酸衍生物及其制备方法与应用
EP4552495A1 (fr) 2023-11-08 2025-05-14 Stiftung Tierärztliche Hochschule Hannover Composition d'additif pour la réduction de charge bactérienne

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US9655912B2 (en) 2017-05-23
EP3068384A1 (fr) 2016-09-21
ES2738632T3 (es) 2020-01-24
US20190314323A1 (en) 2019-10-17
PL3068384T3 (pl) 2019-11-29
CN104244940A (zh) 2014-12-24
US10195172B2 (en) 2019-02-05
CN104244940B (zh) 2018-07-20
WO2013121214A1 (fr) 2013-08-22
EP3569230A1 (fr) 2019-11-20
CA2901407A1 (fr) 2013-08-22
CA2901407C (fr) 2021-11-23
US20190083447A1 (en) 2019-03-21
CN108524524B (zh) 2021-03-19
DK3068384T3 (da) 2019-08-12
BR112014020171B1 (pt) 2021-12-21
US20150025026A1 (en) 2015-01-22
US20170231945A1 (en) 2017-08-17
CN108524524A (zh) 2018-09-14
BR112014020171A2 (pt) 2018-04-10

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